Valve reseater



Patented Sept. 8, 1925.

UNITED STATES PATENT OFFICE.

WALTER M. HOWSER, OF HAMMOND, INDIANA.

VALVE BESEATER.

Application filed m 28, 1924. Serial 1%. 728,780

- re-seating tool having novel means for holding the cutting tool in correct position relative to the valve seat, whereby the valve will be re-cut true.

A further object ofthe invention is th provision of novel means for supporting a cutting tool and for rotating the tool for bringing about the efiicient and expeditious re-facing of the said valve seat.

A still further object of the invention is to provide an improved valve tool of the above character, which will be durable and eificient in use, one which will be simple and easy to manufacture, and one which can be placed upon'the market at a small cost.

With these and other objects in View, the invention consists in the novel constructipn, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a longitudinal vertical section through the improved-valve tool, showing the same in use, and

Figure 2 is a detailed section taken on the line 22 of Figure 1.

Referring to the drawings in 'detail wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the improved valve tool and B a fragment of an internal combustion engine with which the improved tool A is associated.

The engine B can be of the usual or any preferred character and has simply been shown to illustrate the use of the 'tool, and as shown the engine is provided with the usual type of valve seat 5 and guide sleeve 6 for the valve stem (not shown). Of course when the valve seat 5 is to be refaced, the valve and stem are removed in the ordina manner and the 'im roved tool A associate with the engine in 11611 thereof.

The improved tool A comprises the cen-' tering mandrel 10 having its inner end tapered toward its outer end 11. This tapered end 11 is adapted to fit within the sleeve 6 of the valve stem guide and it is obvious that the mandrel 10 will be held in seatv 5. In order to retain the mandrel 10 in its correct centered osition I provide a holding knob 12 which is adapted to be threaded on the lower end of the said mandrel. It can be seen that the mandrel 10 is provided with a threaded shank portion 13 on which the said knob 12 is fitted. The knob 12 in turn is provided with a tapered centering extension 14 which is also adapted to project into the said sleeve 6. It is obvious that when the mandrel 10 is placed in the guide sleeve, and the knob 12 threaded thereon in intimate contact with the said sleeve 6 that the mandrel will be held in posltion against movement.

The tool A also embodies the hollow operating shank 15 which is adapted to fit over and receive the mandrel 10. The lower'end of the operating shank 15 is provided with a reduced threaded extension or shank 16. The shank 15 is preferably slit longitudinally as at 20 and connected by screws 21 to take up wear and play. This shank 16 has threaded thereon the removable cutting tool 17 which asshown is of an annular configuration. The outer surface of the cutting tool is of a substantial conical configuration and is provided with any preferred 'ty e of cutting teeth 18. The upper end 0 the shank ,16 is provided with a reduced polygonal extension 19 for removably receiving any desired type of wrench or. o erating handle 20 as clearly shown in the drawing.

It is obvious that when the valve tool is fitted to the engine as shown, that the valve seat can be easily re-faced in a minimum amount of time and that the said valve seat will be ground true thereby allowing a perfect seat to be had.

Changes in details maybe made without. departing from the spirit, or the scope of th1s invention, but

What I claim as new is:

In a valve re-surfacing tool, a centering mandrel including a cylindrical bearing portion and a reduced threaded extenslon, a hollow split operating shank detachably and rotatably mounted u on the mandrel having a reduced threads extension defining a shoulder at one end and a polygonal exten-v correct central position relative to the valve sion at the other end, adjustable means extending through the split portion of the shank, a refaoing tool threaded upon the threaded extension of the shank in engagement with the shoulder, an operating handle detachably fitted upon the polygonal extension, and a knob adjustebly fitted upon useum the reduced extension of the mandrel having a tdpered bearing ortion for direct engagement with the Va, ve stem guide of the valve.

In testimony whereof I afiix my signw.

ture.

WALTER M. HQWSER. 

